I like Diarium, journaling once a day has helped me feel like I'm not "wasting" my days doing nothing. I started out with just 2 or 3 sentences at first, and now I'm writing down frustrating bits, cool interactions, or sometimes still just a laundry list of what I did. It helps me feel like I'm not just floating through life.
I also like using my credit to offset the cost of the season pass in Marvel Snap once a month, but that's more for just whatever phone game you feel deserves a few bucks now and then (if any).
If you're into mobile games I'd recommend any of the papa's games. I have cluckeria to go and it's helped kill time when i don't have WiFi or a long time to get into something more involved.
In an effort to spend some of my balance a while back, I bought Recipe Keeper. It was $10, I think.
I can't say I use it daily, but it is fantastic if you do any cooking or collecting of recipes. It's easy to share a URL to it, it will strip out the pointless blog post and just give you a well formatted recipe; it has a nice scan feature that makes importing printed recipes easy; and there's even the option to export your own cookbook.